Rotary hoist



Sept. 9, 1930. GREVE 1,775,341

ROTARY HOI ST Filed June 29, 1926 zsheets-sheer 1 Sept. 9, 1930. GR 1,775,341

OTARY HOIST Filed June 29, 1926 v 2 Sheets-She et 2 Patented 9,1930

UNITED STATES PATENT oFF ce EDGAR E. GBEVE, OF BELLEV'UE, PENNSYLVANIA, ASSIGNOR TO OIL WELL SUPPLY COMPANY, 01 PITTSBURGH, PENNSYLVANIA, CORPORATION 015 TENNSYLVANIA ROTARY HOIST Application flied June 29, 1928. Serial No. 119,822.

This invention relates to improvements in hoist mechanism, and more particularly to 1'0- I tary hoist mechanism or means designed for employment'in connection with rotary drill- 5 ing rigs.

Among the objects of my invention are: to provide new and improved means whereby the hoisting mechanism may be operated by a single person to provide a construction in '10 which the clutch operated sprockets mounted on the drum-shaft of the mechanism arev all disposed at one side of the drum ona different portion of the drum-shaft than the portion of said shaft carrying the drum, instead of having, as heretofore, a sprocket and its clutch adjacent the drum and mounted on the shaft between the same shaft bearings; to

provide a construction in which the drum' only is located between the first two posts of the hoist frame, thereby bringingthe bearings 'for the drum-shaft relatively close together and lessening or eliminating the liability of bending the drum-shaft and to provide new and improved clutch actuatin means, all assembled in close relationship an operable from one position.

In the accompanying drawings, which illustrate an application of my invention: Fig. 1 is a side elevational view of a rotary 3o hoist constructed in accordance with my invention; and

, Fig. 2, an end elevational view of the hoist;v Referring to the drawings, 5, 6 and 7 designate posts of a hoisting mechanism frame, 8 a line or counter-shaft, and 9 a drum-shaft. Line-shaft 8 is located above and offset with respect to the drum-shaft 9, and. is driven from a suitable source of power, not shown, by means of a.chain 10 engaging a sprocketwheel 11 fixedly mounted on the shaft 8.

- As illustrated, I have provided a driving means fora rotary table of a rotary drilling rig, not shown, including a clutch operated sprocket '12 and a chain 13. The clutch mech- 5 anism employed in connection withthe loose- 1y mounted sprocket 12 comprises a clutch member 14 preferably formed as part of the hub of sprocket '12, and a slidable clutch member 15.

Member 15 is moved-into and out of clutching position by means of a lever and rod connection, including a pivoted lever 16, rods 17, 18 and 19, and the foot operated pivoted member 20. By disengaging the clutch member 15 from its companion member 14, rotation of the sprocket 12 is stopped, and this in turn stops the rotation of the rotary table until member 15 is again moved into engagement with member 14. o

A characteristic and important feature of my invention resides in the manner of niounting the drum, the clutches, and the sprockets on the drum-shaft 9. As illustrated, the drum 21 with its brake flanges 22 is mounted on the shaft 9 between the posts 6 and 7, and as the drum is the only element carried on the shaft between said posts, the construction enables me to position bearin s 23 and 24' relatively close together, there y providing a short shaft section construction that will not bend or otherwise be seriously affected under extreme load.conditions.

Shaft 9 extends past post 6, and has a bearing 25 carried by the post 5, and, interposed between the post 6 and post 5, the shaft carries the clutches and sprockets hereinafter described.

Mounted on 'each of the brake flanges 22 of the drum, is a divided or two-part brake band 26. The respective brake bandshave one end attached to a pivoted rod 27, and the other end to a pivoted connecting member 28, the latter member being in turn connected with an equalizer bar 29. Equalizing bar 29 is pivotally mounted on a vertically extend-.

ing post 30, and this construction, together with the pivoted connections mentioned, taken in connection with adjusting means 31,

provides an equal pressure on each of the four;

brake bands. While satisfactory equalization of pressure is produced, I also provide a large heat radiating surface by the employment of the several bands.

32 designates a brake lever designed, during operation and at a time when the clutches are thrown out, to hold the load when the lever is pressed down. This lever is formed integral with red 27.

As is well known, in mechanism of the class to which this invention relates it'is necessary to operate the drum at different speeds of rotation. In the present invention, I have shown means for accomplishing these ends, and, as shown, 33 designates a low speed sprocket fixed on the line shaft 8, and 34 the low speed drum-shaft sprocket loosel carried on the drum-shaft 9. These sproc ets are connected by chain 35. Sprocket 34 is provided with a clutch member 36 adapted to co-operate with a slidable clutch member 37 splined on the drum-shaft. Clutch member 37 is designed to be moved into and out of operative engagement by means of a pivoted yoke member 38, rod 39, couplin 40, and a pivotaily supported foot operate pedal member 41, the latter bein connected with rod 39 by a coupling 42.

s ring 43 is employed to urge the slidable c utch member 37 away from clutch member 36.

A, higher speed of the drum than the speed obtained by the mechanism just described may be efieeted by somewhat similar means mounted on the respective shafts, that is to say, by the employment of a sprocket 45 fixed on shaft 8, sprocket 46 loosely mounted on shaft 9, chain i7, and the clutch mechanism on shaft 9. This last mentioned clutch mechanism and its actuating means includes a clutch member 48 integral with s rocket 46, slidable clutch member 49, and a pivoted yoke lever 50.

A still higher speed may be had by means of a sprocket 51 on shaft 8, sprocket 52 on shaft 9, and chain 53. In this connection, the clutch mechanism and its actuating means include clutch member 54.- formed on sprocket 52, movable clutch member 55 slidable on shaft 9, and actuating yoke lever bar 56.

It will be noted that the second and third speed mechanisms are connected with a common horizontally extending slotted bar 57 by means of the respective yoke members 50 and 56, and that the lower ends of members 50 and 56 are joined by a coiled spring 58. 59 and 60 designate slots formed in bar 57, and 61 designates pins carried by the respective members 50 and 56 and movable in the slots.

The common horizontally movable bar 57 is coupled with a slidable actuating rod 62, the latter being designed to be moved by means of the two foot pedals 63 and 64 mounted on rock shafts 63 and 64' journalled in bearings 65 of a plate 66, such rock shafts having yokes'63 and 64", respectively, co-

acting with an abutment 62 on shaft 62. As illustrated, it will be noted that the said pedals are arranged relatively to the actuating rod in such a manner that a movement of one pedal will move rod 62 towards the second and third speed clutches, throwing one clutch mechanism into operative engagement and the other into inoperative position; and that the movement of the other pedal will move rod 62 in the opposite direction, throwing the said first clutch into inoperative position and the second clutch mechanism into operative position. The fulcrum points of the pedals lie above and below the rod 62.

65 designates a casing for enclosing the various clutch mechanisms and their chains. By having the said clutch mechanisms assembled as shown, the casing 65, secured to frame members 66 and 67 of the hoist structure, will readily cover the said clutches and protect an operator from coming into accidental con tact therewith, while at the same time, providing a protecting casing that will not be in the way of an operator.

It will be noted that I have positioned all of the clutch mechanisms in a space or section A, located between the hoist frame posts 5 and 6, and the drum in a space or section B located between the posts 6 and 7. This construction enables me to enclose the clutches, sprockets, and drive chains in the casing 65, and also to have the drum and its flanges only mounted on that portion of the drum shaft between the posts 6 and 7.

Heretofore, it has always been the prac tice to mount a sprocket, together with its clutch member, adjacent the drum and on that portion of the drum shaft located between the posts 6 and 7. This means an increased bending moment on the drum-shaft, resulting in bending the shaft under extreme load conditions. By the arrangement illustrated, this danger of bending the shaft is obviated, for 1 am enabled to place the said posts and the bearings carried thereby relatively close together.

What I claim is:

1. In a hoist for drilling rigs, a hoist frame, a drum-shaft, clutch mechanisms for imparting first, second and third speeds to the drum-shaft, actuating means for the first speed clutch mechanism, and common actuating means for the second and third speed clutch mechanisms including a horizontally movable member, and springactuated pivoted members connecting said horizontal member and the clutch members.

2. In a hoist for drilling rigs, a hoist frame, a line-shaft, a drum-shaft, a rotary clutch member on the line-shaft, a drum thereon,

brake mechanism for the drum having anoperating device, clutch members carried on the drum-shaft, a foot operated actuating mechanism for the rotary clutch member, and foot operated mechanisms for the clutch members mounted on the drum-shaft, said mechanism including lever and rod connections extending from the respective clutch members to a point adjacent said operating device and being operable with the latter by one person from said point.

3. In a three-speed hoist for drilling rigs, a frame including end posts and an intermediate post with the intermediate post arranged closer to one of the end posts than to the other end post, a drum shaft having a relatively long section between the intermediate post and end post remote thereto, a drum mounted on the said long section of the shaft with its ends adjacent to the intermediate post and remote end post, a-first, second and third speed clutch mechanism carried by the drum shaft and all disposed between the intermediate post and end post closer thereto, whereby the use of a clutch between the intermediate and end post remote thereto is avoided.

and being operable with the latter by one person from said point. In testimony whereof I afiix my signature.

EDGAR E. GREVE.

4. In a. three-speed hoist for drilling rigs,

a frame includingv end posts and an intermediate post with the intermediate post arranged closer to one of the end posts than to the other end post, a drum shaft having a relatively long section between the intermediate post and end post remote thereto,

clutch mechanisms carried by the said shaft for imparting first, second and third speeds to the drum shaft all disposed on said shaft between the intermediate post and the closer end post'whereby the use of a clutch between the intermediate and end post remote thereto is avoided, and common actuating means for simultaneously moving the second and third speed clutch mechanisms into and out of operating position. a 5. In a hoist for drilling rigs, a pair of posts, a drum shaft journalled in said posts,

a drum carried by said shaft having its ends relatively close to the respective posts whereby a clutch between such posts is dispensed with, and multiple-speed clutch mechanism associated with said shaft disposed on the opposite side of one of said posts to that occupied by the drum.

6.- In a hoist for drilling rigs, a pair of posts, a drum shaft journalled in said posts,

. a drum carried by said shaft having end flanges arranged relatively close to the respective posts whereby a clutch between such posts is dispensed with, braking means for said flanges, and multiple-speed clutch mechanism associated with said shaft disposed on the opposite side of one of said posts to that occupied by the drum.

7. In a hoist for drilling rigs, a pair of posts and a post spaced therefrom, a drum shaft jou'rnalled in said post, a drumcarried by said shaft having end flanges arranged relatlvely close to the respective posts of said pair whereby a clutch between the same is dispensed with, braking means for said 

